Figure 4.

Flow chart of risk stratification and indications of ICD implantation in ACM. Based on the available data on annual mortality rates associated with specific risk factors, the estimated risk of major arrhythmic events in the high-risk category is >10%/year; in the intermediate category, it ranges from 1 to 10%/year; and in the low-risk category, <1%/year. Indications of ICD implantation were determined by consensus considering not only the statistical risk, but also general health, socioeconomic factors, the psychological impact and the adverse effects of the device. * See the text for distinction between major and minor risk factors. ACM = arrhythmogenic cardiomyopathy; ICD = implantable cardioverter defibrillator; LV = left ventricle; NSVT = non sustained ventricular tachycardia; RV = right ventricle; SCD = sudden cardiac death; VF = ventricular fibrillation; VT = ventricular tachycardia. Modified with permission from Corrado et al. [42].